Oceans

What do ship captains use to help them know when it is safe to dock at the ocean's edge?

More Questions from Oceans
In the Atlantic, hurricane season starts June 1, while in the Pacific it starts when?
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About what percent of all volcanic activity on Earth happens in the ocean?
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What ocean lies between Africa and North and South America?
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The Coral Triangle mainly in Indonesia is also referred to as what?
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Approximately how much does the sperm whale's brain weigh?
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What does a Nictitating membrane on a shark do?
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Fraser's dolphin is also called what name?
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What is a large body of salt water, usually connected to an ocean?
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